/* ---- HERO ---- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--blue-glow) 0%, transparent 70%);
    filter: blur(80px);
    pointer-events: none;
    opacity: 0.4;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background: rgba(59, 130, 246, 0.05);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px var(--green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    position: relative;
}

.hero h1 .noti { color: #ffffff; }
.hero h1 .flow {
    color: var(--blue-bright);
    text-shadow: 0 0 40px var(--blue-glow), 0 0 80px rgba(59, 130, 246, 0.3);
}

.hero .subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    font-weight: 400;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 4rem;
}

/* ---- BUTTONS ---- */
.btn {
    padding: 0.8rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--blue);
    color: #fff;
    box-shadow: 0 0 20px var(--blue-glow), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    background: var(--blue-bright);
    box-shadow: 0 0 40px var(--blue-glow), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--text-muted);
}

/* ---- INSTALL SNIPPET ---- */
.install-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-terminal);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    max-width: 700px;
    width: 100%;
    position: relative;
}

.install-bar .prompt { color: var(--green); user-select: none; }
.install-bar code { color: var(--text-secondary); flex: 1; text-align: left; }

.install-bar .copy-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.75rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.2s;
}

.install-bar .copy-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

/* ---- SECTIONS ---- */
.section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--blue);
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary);
    max-width: 650px;
    font-size: 1.05rem;
    margin-bottom: 3rem;
}

/* ---- FEATURES GRID ---- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--blue-glow), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.feature-card:hover::before { opacity: 1; }
.feature-card:hover { border-color: #1e293b; transform: translateY(-2px); }

.feature-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.15);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ---- ARCHITECTURE FLOW ---- */
.flow-section {
    padding: 6rem 2rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.flow-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.flow-diagram {
    margin-top: 3rem;
}

.flow-diagram .terminal {
    max-width: 800px;
    margin: 0 auto;
}

/* ---- QUICK START ---- */
.quickstart-steps {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    color: var(--blue-bright);
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.step-content .terminal { max-width: 100%; }

/* ---- COMPONENTS GRID ---- */
.components-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.component-card {
    background: var(--bg-terminal);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.2rem 1.5rem;
    transition: border-color 0.2s;
}

.component-card:hover { border-color: #1e293b; }

.component-card .comp-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--cyan);
    margin-bottom: 0.3rem;
}

.component-card .comp-impl {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.component-card .comp-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ---- PAGE NAV ---- */
.page-nav {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 2rem;
}

.page-nav a {
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.3s;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.page-nav a.active {
    color: var(--blue-bright);
    border-color: var(--blue);
    background: rgba(59, 130, 246, 0.08);
}

.page-nav a:hover:not(.active) {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

/* ---- ACK DIAGRAM ---- */
.ack-diagram {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.ack-diagram .server  { color: var(--blue-bright); }
.ack-diagram .client  { color: var(--green); }
.ack-diagram .arrow   { color: var(--text-muted); }
.ack-diagram .label   { color: var(--orange); }
.ack-diagram .success { color: var(--green); }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
    .step             { grid-template-columns: 1fr; gap: 1rem; }
    .features-grid    { grid-template-columns: 1fr; }
    .components-grid  { grid-template-columns: 1fr; }
    .hero-buttons     { flex-direction: column; align-items: center; }
    .install-bar      { flex-direction: column; text-align: center; }
}